Roll grinding and polishing device



Jan. 11 1927. 1 97 G. BELL ROLL GRINDING AND POLISHING DEVICE Filed May 1925 7 SheetsSheet 1 Q 2 2- CU [/W/ENTQR Jan. 1151927.

, G. BELL ROLL GRINDING AND POLISHING DEVICE Filed May 1925 '7 Sheets-Sheet 2 j/VVE/V roe I 56075 .Ze/Z By HTTO/P/VEY Jan. 11 1927.

G. BELL ROLL GRINDING AND POLISHING DEVICE 7 Shets-Sheet s I Filed May 21 1925 N MN & N- 2%. r4. w tk Jan. 11 1927. I G. BELL ROLLGRINDING AND POLISHING DEVICE' iled May 21 925 7 Sheets-Sheet 4 Jan. 11 1927.

Y I G. BELL ROLL GRINDING. AND POLISHING DEVICE 7 Sheets-sheet -5 Filed May 21 1925 &

Jan. 11 1927.

G. BELL ROLL GRINDING AND POLISHING bEvIcE 'Filed May 21 1925 v I '7 Sheets-Sheet 6 Jan. 11 1927.

G. BELL ROLL GRINDING AND POLISHING DEVICE F le y 1925 .7 Sheets-Sheet v fA/i/EA/TO/P Patented Jan. 11, 1927.

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it i 'l S ES GEORGE BELL, 0F GRANITE CITY, ILLINOIS.

ROLL eiunnms AND roLIsn-nvs nnvrcn.

Application filed May 21, 1925. Serial No. 31,862;

This invention relates to roll grinding and polishing devices, and more. particularly to such devices for polishing and resurfacing the rolling mills andvthe like.

In the. manufacture of iron, steel and tin sheets, plates and bars; the metal is passed between cooperating pairs of rolls, spaced apart and rigidly held in position, so as to produce sheets. plates or bars of predetermined and uniform thickness throughout; and in order to assure a smooth. even surface to the product, it is obvious that the surfaces of the rolls must be maintained smooth and true.

The present invention has for its object to provide a simple and efficient apparatus or device which may be originally incorporated in the mill structure or conveniently applied to the in-dinary mill without necessitating any material alteration therein, so as to be always in place, ready for use, and being capable of universal adjustment and manipulation so as to effectively grind, polish an d resurface either the one roll or the other, or both rolls simultaneously without dismantling the mill or interfering with its operation, thereby saving considerable time that would be lost in removing the rolls or even applying andmanipulating a portable device. Other objects and advantages to be attained will morefullyappear in the following description.

The invention consists in the parts and combinations and arrangements of parts hereinafter described and afterwards pointed out with particularity in the appended claims.

In the accompanying drawings forming.

part of this specification. and illustrating practical embodiments of the iuvention,--

Figure 1 is an elevation of the rear or outlet side of an ordinary rolling mill, the mill proper being shown merely schematically in "broken lines and the mechanism of grinding device as applied thereto being shown in full lines;

Figure 2 is a fragmentary view of the front or intake side of the-mill, showing a unititration of the mechanism of the grindin: device as designed for that side of the mill 5 Figure 3 is'a vertical cross-section through the mechanism at the front or intake side of the mill in neutral or off position;

Figure 3* is a similar view of the mechanism modified for application to the rear or outlet sideof the mill;

F iguret is a view of the mechanism shown in Figure -23, with the grinding and polishing elements in operating relation to both the upper and lower rolls;

Figure 4 is a view similar to Figure 4;, but of the mechanism shown in Figure 3;

Figure 5 is a view of the mechanism shown in Figure 3, with the upper grinding and polishing element in engagement with the upper roll of the mill;

Figure 5 is a view similar to Figure 5), but of the mechanism shown in Figure Figure 6 is a view of the mechanism shown in Figure 3, with the lower grinding and polishing elementin engagement with-the lower roll of the mill;

Fig: 6 is a View similar to Figure 6, but of the mechanism. shownin Figure 3;

Figure 7 is a top plan view of the mechanism shown in Figure 8;

Figure 7* is a similar view ofthe mechanism shown in Figure 3 and Figure 8 is a cross-section of the supporting bar for the plunger elements, and showing the application of a fork or clip for retaining the plunger-actuating spring in retracted condition.

Referring now more particularly to Figures 2, 3, l, 5, 6 and 7, illustrating the present invention as applied to the front or intake side of the mill, 1 designates the standards of the mill frame, 2 the upper roll and 3 the lower roll, all of the usual or ordinary form,'and being conventionally shown merely by broken lines.

Mounted on the opposed inner faces of the standards 1 are brackets t having horizontal slots 5 therein, said slots merging at their inner ends in vertical, open-ended slots 6, and having notches 'i" in the upper edges near their opposite ends; and, supported from said brackets a, as by pins 8 working in said slots 5, is a pair of cooperating pendant bars 9 having curvilinear Pii) middle portions 10, said bars respectively hanging freely between said brackets 4: and the faces of the adjacent standards 1.

The pendant bars 9 have correlated lugs 11 on their inner marginal portions about midway between their ends, and similar lugs 12 near their lower ends. An upper cross-bar 13 having notched lugs 14 at its opposite ends litted over the upper edges of the respective lugs 11, and plain lugs 15 engaging the under edges thereof, is thereby supported on said bars 9, yet permitting considerable flexibility in the connection thus ati'orded between the two bars 9. A lower bar 16 is similarly supported on the lugs 12, as by notched lugs 17 hooked over the upper edges of said lugs 12 and by plain lugs 18 engaging the under edges thereof.

Slidably mounted on the upper cross-bar 13 is a pair of box-like frames or shoes 19, each having a block of abrasive material 20 secured therein. in this connection, however, it may be here stated that, while for practical purposes two of these shoes have been found desirable and suticient, yet in some cases a greater number may be employed to advantage and in other cases a single element may sullice, as will later more fully appear.

A similar set of the abrasive elements is provided on the lower cross-bar 16, as at 21, the latter to operate upon the lower roll of the mill and the first mentioned upon the upper roll. The slidable mounting of these elements upon their respective cross bars may be effected in any desirable manner, but it is preferable to merely provide the upper elements with a flanged plate 22 on their upper sides so as to overhang the upper ed 'e of the cross-bar with hook-like effect. This arrangement will readily hold the elements in place during contact with the roll wiose peripheral face is travelling downward in operation, but in the case of the lower elements, where the action of the roll thereon is in the reverse direction, clips 23 are provided on the under sides of the elements so as to project under the crossbar. In this way, the elements may be shifted lengthwise of the respective crossbars and removed and replaced, at will, yet a stable support is afforded them.

The abrasive elements may be provided with sockets 2 1, as shown on the upper set,

for the insertion of a bar or suitable tool, when it is desired to shift or otherwise manipulate them; or, fixed handles 25 may be provded in lieu thereof, as shown on the lower set.

Extending horizontally across from standsection. Preferably, this bar is supported at it ends at the bottom of vertical grooves or slots 2'? in the inner faces of the standards 1, this arrangement affording a support for the bar, yet permitting it to be raised vertically when desired and also facilitating its insertion in place in the mill.

Slidable in a horizontal plane, transversely of the bar 26, adjacent to the inner faces of the standards 1, are plunger elements 28 whose rounded inner end portions 25) abut bearing faces afforded by lugs 30 on the pendant bars 9. These plungers 2b comprise flat plates having longitudinal rectilinear slots 31, of a width COIIQSPOHting to the thickness of the bar, so as to slide freely on the bar. Spring elements 32 are provided on the bar 26 with their free'end portions pressing against the end of the slots 3 thereby exerting their force to press said phingers towards the pendant bars 9, and the lenth of the slots 31 being such as to allow iiicient movement of the plungers to move the abrasive elements on the bars 9 into engagement with the mill rolls.

The plunger elements 28 are provided near their outer ends with slightly inclined, substantially vertical slots 33, at the bottoms of which the end portions ofa shaft 3 1 are journaled. Fixed on this shaft, so as to rotate therewith, are two cams 35, which are respectively located close to the inner faces of said plunger elements 28, so as to serve the dual function of retaining said plunger elements in place longitudinally of the bar 26 and acting upon the bar to retract said plunger elements from said pendant bars 9. Either fixed on the shaft 3%, or as an integral extension of one of the cams 35 as shown, is an operating handle-lever 36.

On the under side of the bar 26 is a yoke 37 having a cross-bar or bolt 38 over which a bell-crank lever or operating element 39 operates, said element- 39 having a notch 10 therein to engage said cross-bar or bolt 38 in one of the operations of said elements, as will presently appear. At the inner end of the element 39 is a cross-head or plate 11 having a pair of apertures therein to receive hook extensions 16 on the lower crossbar 16, so as to afford a flexible or swivellike connection between said element 39 and said crossbar 16, while on the longer, handle-arm of said element 39 a latch mem ber 4-2 is pivoted, as at 43, said latch member being provided for engagement, under certain conditions, with the under side of a cross-bar 441 which is supported on bracket extension l5 of the two standards 1 of the mill frame.

The manipulation and operation of the device will now be described. Normally, when the device is not in use, the shaft 3-1 is turned to bring the cams 35 into engagement with the outer face of the cross-bar 26, thereby retracting the plunger elements 28' (see Fig. 3). The pressure on the pendant bars 9 being thus removed and said bars being loosely supported at their upper ends by the pins 8 in the slots of the brackets 4, I

with their lower end portions swingingly supported by the lower cross-bar 16 due to the engagement of the latter with the bellcrank element 39 whose :notch 40 is at this time engaged with the cross-bar or bolt of the yoke 37, the abrasive elements 19 and 21 are thereby loosely supported and without effective pressure upon the mill rolls, and they may be readily withdrawn from contact with said rolls.

When it is desired to bring the abrasive elements into operative contact with the mill rolls (see Fig. 4) the cams are moved out of active relation tothe cross bar 26 so that the plunger elements 28 are free to be moved inward by the action of the springs 32. The pins 8 being freely movable in the slots 5 of the bracket members 4, and by disengaging the notched portion of the bell-crank 39 fromthe cross-bar or bolt 38 of the yoke 37 so that the bellcrank is free to move inward, tae abrasive elements 19 and 21 are broughtinto contact respectively with the upper and lo :er mill rolls so as to act thereon simultaneously and with equalized pressure, as the action of the plunger elements 28 on the bars 9 is substantially centralized, being on a median line between the two abrasive elements and also between the axes of the mill rolls.

If it is desired to bring only the upper abrasive elements into engagement with the upper mill roll, as shown in Fig. 5', the bell-crank is set with its notched portion 40 in engagement with the cross-bar or bolt 38 of the yoke 37, whereby said cross-bar or bolt 38 functions as a fulcrum below the plunger elements. In this adjustment, the lower end portions of the bars 9, with the adjacent abrasive elements, are held away from the lower mill roll, while the upper abrasive elements are pressed and yieldably held in contact with the upper mill roll, the slot-and-pin connection between the upper portions of said bars 9 and said bracket members 4 permitting this.

Now, in case it is desired to place only the lower abrasive elements in operative relation to the lower mill roll, as shown in Fig. (5, the notched portion iOof the bell-crank 39 is released from engagement with the cross-bar or bolt 38 of the yoke 37, the pins 8 of the bars 9 are brought into engaging relation to the notches 7 in the bracket members at, to which location the fulcrum is transferred. and, by depressing the outer end portion of the handle arm of the bellcrank, the springs 32 force the plunger elements 2% inward, thereby, in turn swinging the bars 9 and carrying the lower abrasive elements 'into contact with the lower mill roll, which being accomplished, the latch member 42 is then in position to ermiti its engagement with the under side 0 the cross bar 44 The latch member 42 being thus engaged under the cross-bar lambviously the lnner end portion 41 of the bell-crank is held at the proper elevation to keep thepins bolt 38 of the yoke 37, together with the" fiexible connection between the inner end portion 41' of the bell-crank and the lower cross bar 16, permits suflicient freedom of action of the associated parts so that the plunger elements are effective in yieldably holding the abrasive elements in contact with the mill roll.

From the foregoing description it is evident that a flexible structure is produced, making the device readily adaptable to universal adjustment so as to effectively act upon either the upper or lower roll of the mill, or upon both rolls simultaneously, as may be desired. Furthermore, the device may be kept in place on the ni'll frame without interference with the regular operation.

of the mill, and it is always at hand for ready application 111 an emergency requiring the removal of scale from the rolls or resurfacing them from any cause, thereby While a pair of the abrasive elements are shown in'the drawings for each of the mill rolls, obviously a greater number may be employed in some cases or only a single ele ment, if des'red, as they may be readily shifted on their respective crossbar-s to cover the entire rang'e'of the mill rolls.

The mechanism hereinabove described is designed more particularly for application to the front or intake side of the mill where the travel of the peripheral faces ofthe rolls is toward each other. TV here the device is to be applied to the rear or outlet side of the mill the mechanism may be mod fied in some respects. -Therefore, apractical modificationis ill'ustrated'in Figures'l, 8, 4, 5 6 and 7, but it is substantially thesame as the first herein described structure, except ng the following particulars.

In the bracket members 4 the notches 7 are located at the'lower sides of the slots for the reception of the pins 8 of the pendant bars 9. This change is made for the reason that, w ien the lower abrasive elements are in engagement with the lower mill roll (see Fig. 6), the action on the bars 9 is in a lil! downward direction as the travel of the peripheral faces of the rolls is away from each other at this side of the mill. A further change is in the arrangement of the bellcrank element 39, which, in this instance, rests on the cross-bar 26 and is provided with a rectilinear notch 46 to engage said bar (see Fig. 5) so as to function s'milarly to the notch 40 on the cross-bar 38 of the yoke 37 in the first herein described structure, when it is desired to apply only the upper abrasive elements to the upper mill roll. The action in case of application of the abrasive elements to both rolls at the same time is quite similar to that of the irst herein described structure.

If it is desired to hold the springs 32 in retracted condition, as when making adjustments in some cases or in removing or replacing parts of the mechanism in making repairs, the springs may be first compressed by the action of the Cams 35. and, then before releasing the cams, forked clips or yolres 47 (see Fig. 8) may be temporarily applied so as to straddle the box 25 and compressed spring, as shown.

O'bviously the device admits of considerable other moditi ztion from the structures shown and described herein, without in the least departing from the spirit of the invention as defined by the appended claims. It is therefore not limited to the specific structures shown.

What is claimed is:

1. In combination with a rolling mill and its rolls, of a frame adapted for both shiftable and swingable movement relatively to the rolls, upper and lower abrasive elements supported on the frame for engagement with the respective rolls, and means for actuating the frame for selectively engaging said elements with one or the other or both of said rolls.

2. In combination with a rolling mill and its rolls, of a frame suspended for movement relatively to the rolls, upper and lower abrasive elements supported on the frame for engagement with the respective rolls, and means for actuating the frame for selectively engaging sa d elements with one or the other or both of said rolls, said means including a stationary cross-bar, plungers mounted for movement on said bar and having engagement with said frame intermediatesaid elenents, and devices for actuating the plungers for shifting the frame towards the rolls and retaining the abrasive elements in engagement therewith.

3. In combination with a rolling mill and its rolls, of a frame suspended for movement towards and from said rolls, upper and lower abrasive elements supported on said frame for operative engagement with the respective rolls, and means for actuating the frame for selectively engaging said elements with one or the other or both of said rolls, said means including a stationary cross-bar, plungers mounted for movement on said bar and having yieldingly engagement with the frame intermediate said elements for retaining said elements in engagement with the rolls, and devices for actuating the plungers for shifting the frame and its carried abrasive elements from the rolls.

4-. In rombination with a rolling mill and its rolls, of a frame suspended for movement towards and from said rolls, upper and lower abrasive elements supported on said frame for operative engagement with the respective rolls, and means for actuating the frame for selectively engagu said elements with one or the other or both of said rolls, said means including a stationary cross-bar, plungers mounted for movement on said bar and having yielding engagement with said frame intermediate said elements for retaining the elements in engagement with the rolls, and devices having engagement with the plungers and the lower end of the frame for shifting the frame from the rolls for carrying the abrasive element-s out of engagement therewith. V

In combination with a rolling mill and its rolls. of a frame having slot and pin suspension for movement towards and from said rolls. upper and lower abrasive elements supported on said frame for operative engagement with the respective rolls, a stationary cross-bar, plungers mounted for movement on said bar and having engagement with the frame intermediate said elements, devices for yieldingly actuating said plungers for shifting the frame towards said rolls for engagement therewith of the abrasive elements, and means including a lever having engagement with the lower end of the frame for shifting the frame relatively to the rolls for carrying the lower abrasive element only out of engagement with its respective roll.

6. In combination with a rolling mill and its rolls, of a frame having slot and pin suspension for movement towards and from said rolls, upper and lower abrasive ele ments supported on said frame for engage ment with the respective rolls, a stationary cross-bar, plunger-s mounted for movement on said bar and having engagement with said frame intermediate said elements, devices for yielding actuating said plungers for shifting the frame towards the rolls for engagement therewith of the abrasive elements, and means for shifting and releasably locking the frame relatively to the rolls for retaining the upper abrasive element out of. and .ne lower abrasive element only in, en- 1*" 'rement with their respective rolls.

In combination with a rolling mill and its rolls, of a frame having slot and pin suspension for movement towards and from said rolls, upper and lower abrasive elements supported on said frame for engagement with the respective rolls, a stationary crossbar, plungers mounted for movement on said bar having engagement with said frame intermediate said elements, devices for actuatingsaid plungers for shifting the frame towards the rolls for engagement therewith of both the abrasive elements, and means for shifting the frame relatively to the rolls and plungers for selectively carrying the upper or lower abrasive element out of engagement with its respective roll.

8. In a rolling mill and the like, in combination with the cooperating pair of mill rolls, of a flexible frame comprising a pair of pendant bars slidably supported transversely at their upper ends cross-bars connecting said pendant bars substantially parallel with the rotative axes of said mill rolls, abrasive elements mounted on said cross-bars in juxtaposition with respectto said mill rolls, spring-pressed plunger elements abutting said pendant bars whereby to move said frame to force said abrasive elements into working contact with the respective mill rolls simultaneously, means for withholding the upper end portions of said pendant bars or the lowerend portions thereof, at will,

whereby to force the respective abrasive elements only into working contact with the upper or lower mill roll, and means for retracting said plunger elements to inactive position with respect to said pendant bars.

9. In a rolling mill and the like, in combination with the cooperating pair of mill rolls, of a flexible frame comprising a pair of pendant bars having a slot-and-pin sup port at their upper ends whereby to have transverse movement at that place, cross-bars supported at their ends on said pendant bars with limited flexibility in their connections, said cross-bars being substantially parallel with the rotative axes of said mill rolls, abrasive elements mounted on said crossbars in juxtaposition to said mill rolls, a supporting bar extending transversely of the mill frame in a plane parallel with and substantially midway between the axes of said mill rolls and also between said cross-bars carrying said abrasive elements, slotted plunger elements slidable transversely on said supporting bar with their inner end portions abutting said pendant bars, springs interposed between said supporting bar and said plunger elements whereby to move the latter inward, cam elements mounted on said plunger elements and operative upon said supporting bars for retracting said plunger elements, means for withholding the upper and lower end portions of said pendant bars, at will, so as to fulcrum said pendant bars thereat, whereby, said abrasive elements may be respectively brought into working contact with both mill rolls at the same time or only the upper or lower roll.

GEORGE BELL. 

